s:[1,4,25,9,16,25];

makelist(i^2, i,1,5);

length(s);

 L : makelist(random(11),i,1,10);

f(x):=is(x<5)$

sublist(L,f);

M1:{b,a,c};

M3:[1,1,2,3,3,3];

M4:setify(M3);

listify(M4);

M2:{a,b};

union(M1,M2);

intersect(M1,M2);

 setdifference(M1,M2);

D:matrix([1,2,3],[1,4,9],[1,16,27]);

h[i,j]:=1/(i+j-x);

h4:genmatrix(h,4,4);

C:transpose(D);

D.C;

E:invert(D);

D.E;

rank(D);

determinant(D);